Video: Nader announces presidential bid

The consumer advocate made the announcement Sunday on NBC's "Meet the Press." He says most Americans are disenchanted with the Democratic and Republican parties, and that none of the presidential contenders are addressing ways to stem corporate crime and Pentagon waste and promote labor rights.

Last month, Nader began an exploratory presidential campaign and launched a Web site that promises to fight "corporate greed, corporate power, corporate control."

Nader's appearance on "Meet the Press" was announced Friday in an e-mail message from Nader's exploratory campaign. The message from "The Nader Team" urges supporters to tell friends and family to watch the show and requests online contributions.

"As you know, we've been exploring the possibilities in recent weeks," the message said.

Nader also ran as a third-party candidate in the 2000 and 2004 presidential elections. He is still loathed by many Democrats who call him a spoiler and claim his candidacy in 2000 cost Democrats the election by siphoning votes away from Al Gore in a razor-thin contest in Florida.

Nader has vociferously disputed the spoiler claim, saying only Democrats are to blame for losing the race to George W. Bush.

Though he won 2.7 percent of the national vote as the Green Party candidate in 2000, Nader won just 0.3 percent as an independent in 2004, when he appeared on the ballot in only 34 states.

Nader was forced to fight dozens of court battles over ballot access in 2004, as Democrats pressed legal challenges over whether he gained enough legitimate signatures to get his name on the ballot.